US4396369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace air volume control apparatus
Assignee: SERVO INSTRUMENT
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Filing: 1980-12-17
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Granted: 1983-08-02
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Expires: 2000-12-17
Abstract
Abstract A furnace air volume control apparatus for controlling the volume of furnace air to achieve efficient burning is disclosed. The apparatus includes regulating valves positioned within supply air inlets and exhaust gas outlets of the furnace. A measured data receiver positioned on the exhaust gas side transmits a measuring signal to a control unit connected to the regulating valves. The control unit includes a storage unit for storing valve positions assigned to respective burner loads. By monitoring various exhaust gas parameters with the measured data receiver and control unit valve position, adjustment in response to changes in the burner load is possible by comparing a previously stored valve position recalled from the storage unit with a characteristic curve. The valve adjusting value stored in the storage unit is essentially congruent with the change in burner load. After exhaust gas stabilization has occurred in response to different burner loads precise correction of the valve position value occurs.
Inventors
- 👤 Gustav Kaessmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:55
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/003; F23N5/006; F23N1/00; F23N1/04; F23N1/042; F23N5/02; F23N5/08; F23N5/082; F23N2223/00; F23N2223/04; F23N2223/08; F23N2225/00; F23N2225/02; F23N2227/00; F23N2227/04; F23N2233/00; F23N2233/06; F23N2233/08; F23N2235/00; F23N2235/02; F23N2235/04; F23N2235/06; F23N2235/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
94 words
A furnace air volume control apparatus for controlling furnace air volume of furnace (1) with at least one regulator valve (7, 22) for changing the volume of furnace air with a measured-data receiver (25) positioned on an exhaust gas side and transmitting a measuring signal to a control unit (9), said control unit regulating the position of said regulator valves for the purpose of changing furnace air volume, the improvement comprising storage unit means connected to the control unit (9) for storing the position of said valves (7, 22) for controlling furnace air volume.
Claim 2
Dependent Claim
94 words
A furnace air volume control apparatus for controlling furnace air volume of furnace (1) with at least one regulator valve (7, 22) for changing the volume of furnace air with a measured-data receiver (25) positioned on an exhaust gas side and transmitting a measuring signal to a control unit (9), said control unit regulating the position of said regulator valves for the purpose of changing furnace air volume, the improvement comprising storage unit means connected to the control unit (9) for storing the position of said valves (7, 22) for controlling furnace air volume.
Claim 3
Dependent Claim
58 words
A furnace air volume control apparatus according to claim 1, wherein said storage unit is capable of storing the new adjusted value of said valve positions (7, 22) for controlling the furnace air volume in a given situation of external control of the burning corresponding to the desired oxygen value in the case of a given burner load.
Claim 4
Dependent Claim
36 words
A control apparatus according to claim 1 or 2, wherein said storage unit is capable of remembering whether the position assigned to the respective burner load was entered based upon a larger or smaller burner load.
Claim 5
Dependent Claim
47 words
A control apparatus according to claim 1, wherein said measured value receiver (25) is capable of measuring flue gas density and soot density in oil burning furnaces, CO-value for gas burning furnaces, and further includes a sensor (19) for the optical detection of the flame temperature spectrum.
Claim 6
Dependent Claim
47 words
A control apparatus according to claim 1, wherein said regulator valves (7, 22) controlling furnace air volume are positioned on the supply air side and exhaust gas side and adjusted in relation to each other, said valves capable of being affected simultaneously by said control unit (9).
Claim 7
Dependent Claim
26 words
A control apparatus according to claim 5, further comprising a value-receiver positioned on the exhaust gas side of the furnace for measuring oxygen values and pressure.
Claim 8
Dependent Claim
31 words
A control apparatus according to claim 1, further comprising means for fully opening the regulator valves (7, 22) during burner switch off and malfunction or before start up of the flame.
Claim 9
Dependent Claim
97 words
A control apparatus according to claim 1, further including means for fully opening said regulator valves (7, 22), said means energizing said valves when the permissible oxygen band width per burner load or other threshold values and in the case of the response of other monitoring functions is exceeded, said means energizing said valves to fully open position, and a time switch device for monitoring the fully open valve position, wherein said time switch device is operative to transmit a signal causing a disturbance report and switch off the burner when an indicated time interval is exceeded.
Claim 10
Dependent Claim
40 words
A control apparatus according to claim 1, further comprising an adjusting device for the adjustment of the permissible oxygen band width corresponding to the course of a desired curve of the oxygen value as a function of the burner load.
Claim 11
Dependent Claim
42 words
A control apparatus according to claim 1, further comprising potentiometers connected to said regulator valves, wherein said potentiometers correspond to the respective adjusting value and the responder values of the potentiometers are compared by addressing limit switches and are monitored by them.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |